Manufacture of compound ingots and mold therefor.



Nn. 694,73l. Y Patented Mar. 4, i902.

S. A. COSGRAVE. y MANUFAGTURE UF MPOUND WGOTS'ND MOLD THEREFUR.

(Application med yMaya?. 1901.)

(No Mariel.)

INVENTOR @MAM/w,

UNrrn *raras SYLVESTER A. OOSGRAVE, OF PITTSBURG,AJPENNSYLVANA, ASSIGNORTO AARON FRENCH, MARGARET L. PATTERSON, AND MARA B. COSGRAVE,

OF PITTSBURG, PENNSYLVAN lA.`

MANUFACTURE OF COMPOUND INGOTS ANO MOLD THEREFOR.

SPECIFICATION forming part' of Letters Patent No. 694,731, daten March4, 1902.

` Application tiled May'Z, 1901.

To al?, whom, t may concern:

Beit known that I, SYLvnsTnRACosenAvn, a citizen of the United States,residing atPittsburg, in the county of Allegheny and State ofPennsylvania, haveinvented or discovered certain new and usefulImprovements in Manufacture of Compound Ingots and Molds Therefor, ofwhich improvements the'following is a specification.

The invention described herein relates to certain improvements in themethod of manufacturing compound ingots, and has for its object theformation of an ingot having two or more substantiall portions thereofdiffering x5 in characteristics and one or more substantial portionsintermediateof the others and possessing the characteristics of theothers,` modiiied the one by the other.

The invention is hereinafter more tullj7 dezo scribed and claimed.

In the accompanying drawings, forming a part of this specification,Figure l isa sectional elevation of an ingot-mold and partitions adaptedto the practice of my invention. Fig. 2 is a sectional elevation of theplane indicated by the line II II, Fig. l.

lIn the practice of my invention Iemploy an ingot-mold l of any suitabledimensions and supported upon the stool 2, asis usual. 3o When the metalis to be teemed through the bottom of the mold the stool is providedwith suitable channel-ways 3, connecting with the compartments of themold and also with sprues or runners et, through which the metal 3 5passes from the ladle. Within the mold I arrange two or more partitions5, dependent upon the number of layers of different metal desired in thecompleted ingot. These partitions, which are formed of thin metalplates, 4o are supported in position inany suitable manner-as, forexample, by means of grooves in the vertical walls of the mold and inthe stool. The spacing or arranging of the partitions Within the mold'will be dependent 4.5 upon the desired thickness of each kind of metalin the completed ingot. Through these partitions are formed openings orperforations 6, extending from the bottom tothe top of the partitions,sothat when metals are cast 5o into the outer compartments portionsthereof serial 62,083. (No moda.)

tween the partitions shall not be sufficient to maintain the vmetal inthe space between the partitions at the'same level as that Vin the outercompartments; In other words, it is preferred that the casting shall beso eiected that the outer compartments, into which the Vmetal is poured,shall be filled more rapidly than the space between the partitions,thereby insuring the flow of metal from each compartment into the spacebetween the partitions, as, for example, when the metal is teemedthrough the bottom of the mold' the total capacity of the perforationsin the partitions should be lessthan the delivering ca.- paoity of thesprues and channels through which the metal passes into the mold.

It is preferred that the partition-plates should be formed ofapproximately the saine grades or kinds of metal as that to be cast intothe several compartments, although this is not necessary, and that thesurfaces of the plates should be pickled and washed, so as to insure thefusion of the metals in contact with .each other. The plates orpartitions should be made sufciently thin to be melted 85 and absorbedby the two bodies of metal on each side ofthe partitions; but if suchabsorption is not complete and entire the two bodies of metal willnevertheless be firmly tied Vtogether by the numerous tongues of metalformed through the perforations, such tongues being integral at theirends with the two bodies on each side of each partition. After the outercompartments ,have been filled the space between the partitions may 95be filled by the metal from either of the ladles or from the two bodiesof metal flowing through the perforations. It is preferred, however,that so much of the space between the partitions as is empty when theouter roo compartments have been filled should be lled by one or theother of the bodies of metal cast.

I claim herein as my invention- 1. As an improvement in the art ofmanufacturing compound ingots, the method herein described, whichconsists in pouring two or more metals in two compartments or chambershaving` adjacent walls formed of a material fusible by said metals andfilling the space intermediate of said walls from each of saidcompartments prior to the fusion of the Wall of the compartment,substantially as set forth.

2. As an improvement in the art ofmanufacturing compound ingots, themethod herein described, which consists in pouring two or more differentmetals into two compartments or chambers having adjacent Wallsperforated and formed of a material fusible by said metals andiillingthe space intermediate of said walls by the metal from each ofsaid compartments, substantially as set forth.

3. As an improvement in the art of manufacturing compound ingots, themethod herein described which consists in pouring two or more differentmetals into two compartments or chambers having adjacent Wallsperforated and formed. of a material fusible by said metals whereby themetal Will iiow from said compartments or chambers into the spaceintermediate of said walls and regulating the flow of metal into thechambers and space so that the chambers will fill more rapidly thantbe'intermediate space, substantially as set forth.

In testimony whereof I have hereunto set my hand.

SYLVESTER A. COSGRAVE.

Witnesses:

DARWIN S. WoLCo'rT, F. E. GAITHER.

